Class Checker

python/pathway/tests/test_py_object_wrapper.py:264–290

    @dataclass
    class Checker:
        error: AssertionError | None = None

        def __call__(self) -> bool:
            if not output_path.exists():
                return False
            try:
                G.clear()
                result = pw.io.csv.read(output_path, schema=OutputSchema, mode="static")
                expected = pw.debug.table_from_markdown(
                    """
                    res
                    abab
                    defx
                    defdef
                    xx
                    xdef
                """
                )
                assert_table_equality_wo_index(result, expected)
                return True
            except AssertionError as e:
                self.error = e
                return False

        def provide_information_on_failure(self) -> str:
            return str(self.error)

    wait_result_with_checker(
        Checker(),